Method for manufacturing brass-plated steel wire and apparatus for drawing brass-plated steel wire
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United States of America Patent
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Sep 25, 2018
Grant Date -
Nov 25, 2010
app pub date -
Jan 26, 2009
filing date -
Jan 25, 2008
priority date (Note) -
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Abstract
A wire drawing apparatus (10) is used in a final drawing process to ensure adequate initial performance of adhesion between brass-plated steel wire and rubber without a drop in productivity. At least one of the die (14z) disposed in the most downstream position, the die (14y) disposed in the second most downstream position, and the die (14x) disposed in the third most downstream position is a drawing die having a friction coefficient μ of 0.12 to 0.41 with the brass-plated steel wire. The other dies (14) are drawing dies each having a friction coefficient μ of 0.1 or below. By using these drawing dies, brass-plated steel wire (13) is drawn, and a noncrystalline portion of high lattice defect density is formed on the surface of the crystalline portion of the brass-plating layer of the brass-plated steel wire (13).
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